建筑结构学报2009，Vol.30Issue(6)：67-76,10.
框架结构抗地震倒塌能力的研究——汶川地震极震区几个框架结构震害案例分析
Seismic collapse resistance of RC frame structures——Case studies on seismic damages of several RC frame structures under extreme ground motion in Wenchuan Earthquake
摘要
Abstract
The seismic damage of several groups of RC frames in the hardest-hit zone of the Great Wenchuan Earthquake is introduced. In each group, some frames collapsed while others survived, despite that they had similar site condition. The collapse resistance of two typical frames in earthquake is analyzed with elastic-plastic time-history analysis, pushover analysis and collapse margin ratio(CMR) analysis which is based on incremental dynamic analysis (IDA). The corresponding collapse resistance research and calculation methods in foreign countries are introduced. The main influencing factors and the evaluation indices that control the structural collapse resistance, as well as the global redundancy and integrity, are discussed. Based on this study, the following methods are identified to be effective in improving the collapse resistance of frames: (1)guarantee the global loading resistance capacity and lateral deformation capacity; (2) increase the redundancy and integrity; (3) achieve rational yield mechanism with proposed engineering method; (4) buildup dual-system for frame structures with infill walls. Finally, the problems that may need further research on structural collapse are proposed.关键词
汶川地震/框架结构/倒塌/弹塑性时程分析/结构倒塌储备系数/冗余度/整体性Key words
Wenchuan Earthquake/RC frame/collapse/elastic-plastic time-history analysis/collapse margin ratio/redundancy/integrity分类
建筑与水利引用本文复制引用
叶列平,陆新征,赵世春,李易..框架结构抗地震倒塌能力的研究——汶川地震极震区几个框架结构震害案例分析[J].建筑结构学报,2009,30(6):67-76,10.基金项目
国家自然科学基金重大研究计划重点项目(90815025),国家科技支撑计划课题(2006BAJ03A02),国家科技支撑计划项目(2009BAJ28B01). （90815025）
